From: Ian Rogers <irogers@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org
Cc: Stephane Eranian <eranian@google.com>, Ian Rogers <irogers@google.com>
Subject: [PATCH 0/2] Improvements for kallsyms__parse
Date: Thu, 30 Apr 2020 12:35:55 -0700 [thread overview]
Message-ID: <20200430193557.101831-1-irogers@google.com> (raw)
kallsyms__parse is called 4 times during perf record startup. Add a
benchmark to measure its performance. Transition it to using the api
io.h buffered reading, improving performance by ~8% or saving ~5% from
perf record start up time.
Ian Rogers (2):
perf bench: add kallsyms parsing
lib kallsyms: parse using io api
tools/lib/api/io.h | 3 ++
tools/lib/symbol/kallsyms.c | 81 +++++++++++++++++++------------------
tools/perf/bench/Build | 1 +
tools/perf/bench/bench.h | 1 +
tools/perf/builtin-bench.c | 1 +
5 files changed, 47 insertions(+), 40 deletions(-)
--
2.26.2.526.g744177e7f7-goog
next reply other threads:[~2020-04-30 19:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 19:35 Ian Rogers [this message]
2020-04-30 19:35 ` [PATCH] perf bench: add kallsyms parsing Ian Rogers
2020-04-30 19:35 ` [PATCH 2/2] lib kallsyms: parse using io api Ian Rogers
2020-05-01 12:23 ` Jiri Olsa
2020-05-01 15:28 ` Ian Rogers
2020-05-01 22:15 ` Ian Rogers
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